Cover for a field camera focus plate



FIG. 1 is a front elevational view of a cover for a field camera focus plate showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a cover for a field camera focus plate, as shown and described. 